Update Fireworks Documentation (#1170)

## Overview
Update FireworksAI integration docs to point towards serverless models
and fix broken hyperlinks.

## Type of change

**Type:** Update existing documentation

## Related issues/PRs

## Checklist
<!-- Put an 'x' in all boxes that apply -->
- [x] I have read the [contributing guidelines](README.md)
- [x] I have tested my changes locally using `docs dev`
- [x] All code examples have been tested and work correctly
- [x] I have used **root relative** paths for internal links
- [x] I have updated navigation in `src/docs.json` if needed
- I have gotten approval from the relevant reviewers
- (Internal team members only / optional) I have created a preview
deployment using the [Create Preview Branch
workflow](https://github.com/langchain-ai/docs/actions/workflows/create-preview-branch.yml)

## Additional notes
<!-- Any other information that would be helpful for reviewers -->

---------

Co-authored-by: Mason Daugherty <github@mdrxy.com>
Co-authored-by: Mason Daugherty <mason@langchain.dev>

Author: RobertoBarrosoLuque

src/oss/python/integrations/chat/fireworks.mdx

@@ -12,7 +12,7 @@ Fireworks AI is an AI inference platform to run and customize models. For a list
 
 | Class | Package | Local | Serializable | [JS support](https://js.langchain.com/docs/integrations/chat/fireworks) | Downloads | Version |
 | :--- | :--- | :---: | :---: |  :---: | :---: | :---: |
-| [ChatFireworks](https://python.langchain.com/api_reference/fireworks/chat_models/langchain_fireworks.chat_models.ChatFireworks.html) | [langchain-fireworks](https://python.langchain.com/api_reference/fireworks/index.html) | ❌ | beta | ✅ | ![PyPI - Downloads](https://img.shields.io/pypi/dm/langchain-fireworks?style=flat-square&label=%20) | ![PyPI - Version](https://img.shields.io/pypi/v/langchain-fireworks?style=flat-square&label=%20) |
+| [`ChatFireworks`](https://docs.langchain.com/oss/python/integrations/chat/fireworks) | [`langchain-fireworks`](https://pypi.org/project/langchain-fireworks/) | ❌ | beta | ✅ | ![PyPI - Downloads](https://img.shields.io/pypi/dm/langchain-fireworks?style=flat-square&label=%20) | ![PyPI - Version](https://img.shields.io/pypi/v/langchain-fireworks?style=flat-square&label=%20) |
 
 ### Model features
 
@@ -61,7 +61,7 @@ Now we can instantiate our model object and generate chat completions:
 from langchain_fireworks import ChatFireworks
 
 llm = ChatFireworks(
-    model="accounts/fireworks/models/llama-v3-70b-instruct",
+    model="accounts/fireworks/models/kimi-k2-instruct-0905", # Model library in: https://app.fireworks.ai/models
     temperature=0,
     max_tokens=None,
     timeout=None,
@@ -85,7 +85,7 @@ ai_msg
 ```
 
 ```output
-AIMessage(content="J'adore la programmation.", response_metadata={'token_usage': {'prompt_tokens': 35, 'total_tokens': 44, 'completion_tokens': 9}, 'model_name': 'accounts/fireworks/models/llama-v3-70b-instruct', 'system_fingerprint': '', 'finish_reason': 'stop', 'logprobs': None}, id='run-df28e69a-ff30-457e-a743-06eb14d01cb0-0', usage_metadata={'input_tokens': 35, 'output_tokens': 9, 'total_tokens': 44})
+AIMessage(content="J'adore la programmation.", additional_kwargs={}, response_metadata={'token_usage': {'prompt_tokens': 31, 'total_tokens': 41, 'completion_tokens': 10}, 'system_fingerprint': '', 'finish_reason': 'stop', 'logprobs': None, 'model_provider': 'fireworks', 'model_name': 'accounts/fireworks/models/kimi-k2-instruct-0905'}, id='lc_run--a2bdeca3-6394-4c80-97ad-2fc8db9f54bb-0', usage_metadata={'input_tokens': 31, 'output_tokens': 10, 'total_tokens': 41})
 ```
 
 ```python
@@ -98,7 +98,7 @@ J'adore la programmation.
 
 ## API reference
 
-For detailed documentation of all ChatFireworks features and configurations head to the API reference: [python.langchain.com/api_reference/fireworks/chat_models/langchain_fireworks.chat_models.ChatFireworks.html](https://python.langchain.com/api_reference/fireworks/chat_models/langchain_fireworks.chat_models.ChatFireworks.html)
+For detailed documentation of all ChatFireworks features and configurations head to the [API reference](https://reference.langchain.com/python/integrations/langchain_fireworks/)
 
 
 
@@ -129,14 +129,15 @@ pip install langchain-fireworks
     set FIREWORKS_API_KEY=your_api_key
     ```
 
-2. Set up your model using a model id. If the model is not set, the default model is `fireworks-llama-v2-7b-chat`. See the full, most up-to-date model list on [fireworks.ai](https://fireworks.ai/models).
+2. Set up your model using a model id. If the model is not set, the default model is `fireworks-llama-v2-7b-chat`. See the full, most up-to-date model list on [fireworks.ai](https://app.fireworks.ai/models).
 
 ```python
 import getpass
 import os
+from langchain_fireworks import ChatFireworks
 
 # Initialize a Fireworks model
-llm = Fireworks(
+llm = ChatFireworks(
     model="accounts/fireworks/models/llama-v3p1-8b-instruct",
     base_url="https://api.fireworks.ai/inference/v1/completions",
 )

src/oss/python/integrations/llms/fireworks.mdx

@@ -18,14 +18,14 @@ This example goes over how to use LangChain to interact with `Fireworks` models.
 
 | Class | Package | Local | Serializable | [JS support](https://js.langchain.com/v0.1/docs/integrations/llms/fireworks/) | Downloads | Version |
 | :--- | :--- | :---: | :---: |  :---: | :---: | :---: |
-| [Fireworks](https://python.langchain.com/api_reference/fireworks/llms/langchain_fireworks.llms.Fireworks.html#langchain_fireworks.llms.Fireworks) | [langchain-fireworks](https://python.langchain.com/api_reference/fireworks/index.html) | ❌ | ❌ | ✅ | ![PyPI - Downloads](https://img.shields.io/pypi/dm/langchain_fireworks?style=flat-square&label=%20) | ![PyPI - Version](https://img.shields.io/pypi/v/langchain_fireworks?style=flat-square&label=%20) |
+| [`Fireworks`](https://python.langchain.com/api_reference/fireworks/llms/langchain_fireworks.llms.Fireworks.html#langchain_fireworks.llms.Fireworks) | [`langchain-fireworks`](https://pypi.org/project/langchain-fireworks/) | ❌ | ❌ | ✅ | ![PyPI - Downloads](https://img.shields.io/pypi/dm/langchain_fireworks?style=flat-square&label=%20) | ![PyPI - Version](https://img.shields.io/pypi/v/langchain_fireworks?style=flat-square&label=%20) |
 
 ## Setup
 
 ### Credentials
 
 Sign in to [Fireworks AI](http://fireworks.ai) for the an API Key to access our models, and make sure it is set as the `FIREWORKS_API_KEY` environment variable.
-3. Set up your model using a model id. If the model is not set, the default model is fireworks-llama-v2-7b-chat. See the full, most up-to-date model list on [fireworks.ai](https://fireworks.ai).
+3. Set up your model using a model id. If the model is not set, the default model is fireworks-llama-v2-7b-chat. See the full, most up-to-date model list on [fireworks.ai](https://app.fireworks.ai/models).
 
 ```python
 import getpass
@@ -54,7 +54,7 @@ from langchain_fireworks import Fireworks
 
 # Initialize a Fireworks model
 llm = Fireworks(
-    model="accounts/fireworks/models/llama-v3p1-8b-instruct",
+    model="accounts/fireworks/models/llama-v3p1-8b-instruct", # Model library in: https://app.fireworks.ai/models
     base_url="https://api.fireworks.ai/inference/v1/completions",
 )
 ```
@@ -69,7 +69,7 @@ print(output)
 ```
 
 ```output
- If Manningville Station, Lions rookie EJ Manuel's
+  That's an easy one. It's Aaron Rodgers. Rodgers has consistently been one
 ```
 
 ### Invoking with multiple prompts
@@ -86,7 +86,7 @@ print(output.generations)
 ```
 
 ```output
-[[Generation(text=" We're not just asking, we've done some research. We'")], [Generation(text=' The conversation is dominated by Kobe Bryant, Dwyane Wade,')]]
+[[Generation(text=' You could choose one of the top performers in 2016, such as Vir')], [Generation(text=' -- Keith Jackson\nA: LeBron James, Chris Paul and Kobe Bryant are the')]]
 ```
 
 ### Invoking with additional parameters
@@ -145,4 +145,4 @@ for token in chain.stream({"topic": "bears"}):
 
 ## API reference
 
-For detailed documentation of all `Fireworks` LLM features and configurations head to the API reference: [python.langchain.com/api_reference/fireworks/llms/langchain_fireworks.llms.Fireworks.html#langchain_fireworks.llms.Fireworks](https://python.langchain.com/api_reference/fireworks/llms/langchain_fireworks.llms.Fireworks.html#langchain_fireworks.llms.Fireworks)
+For detailed documentation of all `Fireworks` LLM features and configurations head to the [API reference](https://reference.langchain.com/python/integrations/langchain_fireworks/)